Laminated structure



Patented lleb,D 5, E924.,

sierra stars f iastate ,rarest eiseres,

JOHN W. BUNKER .AND .ASHTON l. BONEY, 0F NEW YORK, N. Y., ASSIGNORS TG SERVICE BAG G0. INC., QF NEW YORK, N. Y., A CORPORATION 0F NEW YORK.

MMNAT STRUCTURE.

application mea retruary ce, rear. serial rre. acatar.

To all whomzt may concer/1,.'l v

Be it known that JOHN W. BUNKER and ASHTON M. BoNnY, residents of the city of New York, county of New York, and State of New York, citizens of the United States, have invented certain new and useful lmproveinents in Laminated Structures, of which the following is a specification.

Our invention is an improved material and it consists of laminations, 'the inner of which is of thin metal or alloy and the outer laminations of some fabric such aspaper or textile material all of which layers are united inseparably to form a material out of which diderent articles may be cut or stamped, such, for example, as envelope fasteners and the like.

In the accompanying drawings,

Figure 1 is a view in perspective showing the laminations partly together and partly separated.

Figure 2 is an enlarged section through the layers.

A, represents an intermediate lamination of thin sheet metal; rlhis may be in the nature of an alloy, if desired, but it is intended to have the quality of being easily and repeatedly bent and it is adapted when bent to take a set.

In the preferred form moderately large l holes 2, yare punched through this interme-` 'diate layer of metal The numeral 3 represents a sheet or lamination of paper or textile such as cloth. The two layers A and 3 are preferably secured together by forming small indentations 4, of which there are a great number in the metal layer A, into the layer 3, of paper pr fabric whereby the are inseparably secured to- -gether. A t ird layer or lamination 6, of'

paper or fabric is made to adhere to the back of the metal plate and to facilitate this the layer 6 may be processed on the inner surface -to dissolve the superficial cellulose somewhatI as vulcanized libre is formed by the wellknown zinc chloride treatment, or it may be -made adherent by the application of' any44 well-known agglutinant. The several layers or laminations A, 3 and 6, and more, if desired, may be carried on as many dlerent rollers, and then brought together as indicated at the lower end of Figure by drawing them o and subjecting the several layers or laminations to pressure suflicient to cause a permanent juncturevof the several layers or laminations thereby forming a single composite product of alternate layers of metal and paper or other fabric such as some textile, the pressure to which these layers are subjected, causing the projected ends of the indentations 4, to enter the back of lamination 3, and the agglutinant on layer 6, into the recesses formed in the back of layer A, by the formation of these indentations, and the two laminations 3 and 6 to adhere to each other through the holes 2, in the metal layer.

ln this way we provide a composite material out of which various things may be stamped, such, for exam-ple, as handles and fasteners for paper bags and clips of various descriptions in which the article formed is adapted to be bent and to remain in that position until rebent. ln other words, we provide a product of this genera-l description which is capable of vbeing repeatedly bent without breaking and of suiicient strength to maintain the position into which it is bent until occasion may require a rebending of the article formed. i

WeY claim,

A iiexible, composite material composed of a plurality of laminations, including an intermediate lamination of thin sheet metal having )holes therethrough and indentations made from one side thereof, the projecting ends of which are made to enter and fasten to the adjacent lamination and an agglutinant between the metal layer and the other adjacent fibrous layer which causes the two to adhere by covering the adjacent surfaces,

entering the indentations and extending through the holes to the layer on the opposite side of the metal layerwhereby a single product is formed of the several layers.v p

'In testimony whereof we hereunto aliix our signatures.

JoHNw. BUNKER. .asH'roNiu-BONEY. 

